Prof. Faeeza Abd Al-Qadir Abd Al-Razzaq, Amani Issam Bahloul 2021. The Effect of the Perkins &Blythe Model on The Systematic Thinking Skills of Second-Intermediate Students in Mathematics. Turkish Journal of Computer and Mathematics Education (TURCOMAT). 12, 14 (Sep. 2021), 3417–3425. DOI:https://doi.org/10.17762/turcomat.v12i14.10937.